Telegraphic apparatus.



110.806,891. PATENTED DEC. 12, 1905. M. A. HAWLB'Y 6L W. L. RHOADS.

TELEGRAPHIG APPARATUS.

APPLICATION FILED APR.3, 1905.

2 SHEETS-SHEET l,

llllll Q No. 806,891. PATENTBD DEG.12, 1905. M. A. HAWLBY & W. L. RHOADS.

TELEGRAPHIG APPARATUS.

APPLICATION FILED APR.3, 1905.

ff af UNITED STATES PATENT OFFICE.

MELVILLE A. HAVLEY AND WILLIAM L. RHOADS, OF ST. LOUIS, MIS- SOURI; SAID RHOADS ASSIGNOR TO SAID HAVVLEY.

TELEGRAPHIC APPARATUS.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed April 3, 1905. Serial No. 253,476.

To a/ZZ whom, t may concern:

Be itknown that we, MnLvILLn A. HAwLnY and WILLIAM L. RHoADscitiZeus of the United States, residing at St. Louis, in the State of Missouri, have invented a new and useful Improvement in Telegraphic Apparatus, of which the following' is a specification.

Our invention relates to a combined telegraphic relay direct repeater and transmitter for automatically transferring telegraphic signals in either direction from one to the other of two normally closed circuits, and has for its object to simplify the repeating of signals directly from the relay-armatures without the use of intermediate transmitters, to obtain iirmer signals and quicker response to breaks or interruptions from any point of signaling, and to increase the power at the relay of any given current.

The invention consists in features of novelty, as hereinafter described and claimed, reference being had to the accompanying drawings, forming part of this specification, whereon- Figure l is a top plan view of our improved combination-relay direct repeater and transmitter, hereinafter referred to as relay for .avoiding repetition of nomenclature, arranged in duplicate, with a system of wiring and line equipment therefor shown diagrammaticall y; Fig. 2, a front elevation, to enlarged scale, of the relay, omitting the wiring; Fig. 8, a top plan thereof broken away; and Fig. 4:, a vertical longitudinal section, partlyin elevation, to exaggerated scale through the auxiliary magnet and adjacent armature forming parts of our invention, on line i 4 in Fig. l.

Like letters and numerals of reference denote like parts in all the figures.

A represents our improved relay at the terminal of the west main-line circuit, and A/ a duplicate thereof at the terminal of the east main-line circuit.

The relays A Al respectively comprise the the usual relay main-line magnets a a' and an auxiliary magnet which are arranged in the order named side by side in central transverse horizontal alinement, the magnets a a o being successively located farther from the fulcrum of the main armature c, whereby the attractive power on the latter of each successive magnet from any given current is proportionately increased.

To the rear side of the main armature c,

which in the present case is controlled by all the magnets L a' o, is iixed one end of a secondary armature d, which is preferably composed of a springy metal bar insulated from the main armature c at its attachment thereto by an interposed block e of insulating material, the free elastic end portion of the secondary armature CZ extending beyond the corresponding end of the main armature@ and adapted to make contact with an adjustable contact-point f for repeating and transmitting signals along the desired line, while the free end of the main armature c is adapted to make contact with an adjustable contact-point g, which controls the auxiliary magnet bof the duplicate or east relay A.

Behind the secondary armature (Z, at a suit` able distance therefrom, is arranged an adjustable back-stop /L for limiting the backward movement of the armatures c and d, which are held at a normal distance apart adjacent to the springy free end portion of the secondary armature CZ by an interposed block e' of insulating material, which is aiiixed tothe main armature c.

Behind the main armature c is arranged the usual adjustable retracting-spring 7a, and attached to the main-line magnets t a and auxiliary magnet respectively, is the spring' and thumb-screw adjuster Z Z.

l, 2, 3, 4, 5, 6, 7, and` 8 are the usual binding-posts, to which on the under side of the base m (indicated by broken lines in Fig. l) are connected the wiring from the magnetcoils, armatures, and contact-points above described, while from the said posts at the upper side of the base m pass the various wires, connecting the relays A A together and to their cooperative switches, keys, local batteries,and main-line wires, as hereinafter more particularly referred to.

Under normal conditions the circuits of both the east and west main-line wires 9 9 are closed, the current passing along the east wire 9 to the binding-post 6 of the west relay A and thence to the secondary armature l and its contact-point f, thence by wire l() to binding-post 5, and from the latter to switch ll and binding-post l of the east relay A, thence to the main coils e a' of the latter to the binding-post 2 thereof, and from the latter to the key 12 and Inain battery 13 to earth, and conversely in like manner as to the current passing along the west wire 9 to the binding-post IOO 6 of the east relay A, and so on to the main battery 13 and earth, thereby creating magnetism in the cores of the main-line coils ci a of both relays A A, which attracts the armatures c and CZ and drawing them forward closes the contacts fand g of both relays A A and in so doing' shunts out the current from the auxiliary coils b of Aboth relays A A', the local battery 14 of the west relay A being shunted by the main armature c of the east relay A through its two contacts, one of which, the fulcrum of the armature c, is connected by wire 15 to the binding-post 8, thence to the connection of the wire 15 with the local wire 16, thence to switch 17 to one end of local battery 14 and through the latter back through the connection 18 to the binding-post 7 of the east relay A, and thence to the other adjustable local contact g thereof, the local battery 14 of the east relay A' being' shunted out and the auxiliary coil b thereof controlled by the main armature c of the west relay A in like manner.

Vith the circuits under normal conditions, as above described, there will be no current passing through either of the auxiliary coils the main armatures c of both relays A A being held closed by the current passing through the main coils a a'.

Vhen desired to signal from the east along the main-line wire 9, the operator thereat opens and closes his key. Opening the eircuit deprives the main coils L a of the east relay A of magnetism, which allows its a1'- matures c and CZ to be di'awn back by the retraeting-spring it', which in tui'n opens the west main-line wire 9 through the wires before described, thereby depriving the main coils a ce of both relays A Af of their niagnetism, but at the same time opens the shunt of the west local battery 14, and thereby allows the current to iiow through the auxiliary coil Z1 ofthe west relay A, which becomes magnetized and prevents the corresponding armatures ed from dropping back and breaking their contacts, thereby maintaining the continuity of the east main line 9, and conversely in like manner for maintaining the continuity of the west main line 9.

By the use of a secondary spring-armature CZ, fixed to and extending beyond the main armature c, signals can be transmitted directly to the opposite line without an intermediate and separate transmitter, thereby simplifying the construction of the apparatus, reducing' cost, obtaining firmer signals, and facilitating manipulation, adjustment, and repair. Also by the springiness of the secondary armature Z we are able by proper adjustment to prevent a break back into the main line upon its being opened and closed, or, in other woi'ds, when the armatures e and l of either relay drop back the contact of the main armature at f/ is bi'oken momentarily sooner than the contact of the secondary armature Z with its contactf, thereby allowing the current from the local battery 14 or 14 to liow through either of the auxiliary magnets as the case may be, and so hold the armatures c and l of the opposite relay closed. Furthermore, byarranging the magnets successively farther from the fulcrum of the armature, as above described, the power of any given cui'- rent is increased and a greater working margin of the apparatus obtained with a lighter and simpler form of armature.

It is to be here noted that the coils of the auxiliary magnets are iron-clad with simple winding.

That we claim as our invention, and desii'e to secure by Letters Patent, is 4 In telegraphic apparatus, the combination with a relay having themain-line magnets and armature for shunting the circuit of a local battery, of an auxiliary magnet, and a secondary springy armature lixed to, and iusulated from the said main armature, the free end of the secondary armature being' extended beyond the corresponding end of the main armature and adapted to make and break contact with an adjustable contact-point in the main-line circuit for directly repeating and transmitting signals in to the opposite line, substantially as described.

In testimony whereof we have signed our names to this specification in 4the presence of two subscribing witnesses.

MELVILLE A. HAVLEY. TILLIAM L. ltHOADS. ltlitnesses:

MARY D. VHI'rcoMB, EDWARD W. FURRELL. 

